U.S. Type Drop Forged Turnbuckle

Item No.: 702001
A turnbuckle is a common rigging device that is used to adjust tension and reduce slack in a rope, cable, or similar tensioning assembly. A turnbuckle is a basic piece of rigging equipment that can be used in a diverse set of tension-related applications.
Description What is a Turnbuckle ?
Description

H-Lift U.S. Type Drop Forged Turnbuckle

A turnbuckle is a piece of hardware used to eliminate slack and adjust tension in a rope, cable, or other tensioning system.

ASME B30.26 – Rigging Hardware defines a turnbuckle as “an adjustable device consisting of three primary components: a body, a right-hand threaded end fitting, and a left-hand threaded end fitting.”

  • Drop forged, quenched and tempered
  • Safety factor: 5:1
  • Proof load: 2.5 times the Working Load Limit
  • Finish: H.D.G., self colored or electro galvanized
  • End fitting: hook & hook, hook & eye, eye & eye, jaw & eye, jaw & jaw, stub end
  • Lock nuts available for all sizes.
  • Federal Specification FF-T-791b, Type 1, Form 1 and ASTM F1145-92
  • Note: turnbuckles are recommended for straight or in-line pull.
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U.S. Type Drop Forged Turnbuckle
 
Item No.

Size/inch

Dia.&takeup 

W.L.L.lbs Weight (lbs) Product Code
H&H H&E E&E J&E J&J Stub End E&E H&H E&H JAW&EYE Stub End JAW&JAW
TB106100 1/4 X 4 400 500 0.30 0.30 0.29 0.40 70200106100
TB108113 5/16 X 4-1/2 700 800 0.50 0.53 0.46 0.58 70200108113
TB110152 3/8 X 6 1000 1200 0.75 0.82 0.75 0.93 70200110152
TB113152 1/2 X 6 1500 2200 1.50 1.62 1.36 1.68 70200113152
TB113228 1/2 X 9 1500 2200 1.75 1.82 1.69 1.85 70200113228
TB113304 1/2 X 12  1500 2200 2.18 2.19 2.00 2.20 70200113304
TB116152 5/8 X 6 2250 3500 2.63 2.59 2.15 2.82 70200116152
TB116228 5/8 X 9 2250 3500 3.00 3.01 2.70 3.25 70200116228
TB116304 5/8 X 12 2250 3500 3.25 3.50 3.22 3.75 70200116304
TB119152 3/4 X 6 3000 5200 3.75 4.25 3.25 4.68 70200119152
TB119228 3/4 X 9 3000 5200 4.50 5.00 4.00 5.38 70200119228
TB119304 3/4 X 12 3000 5200 5.75 5.75 4.65 6.12 70200119304
TB119457 3/4 X 18 3000 5200 7.00 7.25 6.12 7.25 70200119457
TB122152 7/8 X 6 4000 7200 5.85 6.29 4.75 6.84 70200122152
TB122304 7/8 X 12 4000 7200 8.38 8.88 6.67 9.36 70200122304
TB122457 7/8 X 18 4000 7200 10.25 10.60 8.75 11.44 70200122457
TB125152 1 X 6 5000 10000 8.76 9.16 6.41 9.51 70200125152
TB125304 1 X 12 5000 10000 11.25 12.00 8.90 12.88 70200125304
TB125457 1 X 18 5000 10000 14.00 14.75 11.70 16.10 70200125457
TB125609 1 X 24 5000 10000 17.00 17.75 14.30 18.60 70200125609
TB132152 1-1/4 X 6 6500 15200 15.45 16.03 10.40 16.69 70200132152
TB132304 1-1/4 X 12 6500 15200 19.00 21.20 14.20 23.60 70200132304
TB132457 1-1/4 X 18 6500 15200 24.10 26.00 18.00 26.60 70200132457
TB132609 1-1/4 X 24 6500 15200 25.00 28.70 21.80 31.20 70200132609
TB138304 1-1/2 X 12 7500 21400 27.00 31.10 20.50 35.50 70200138304
TB132457 1-1/2 X 18 7500 21400 31.20 36.40 26.20 40.70 70200132457
TB138609 1-1/2 X 24 7500 21400 38.20 44.20 31.40 47.60 70200138609
TB144457 1-3/4 X 18 - 28000 45.20 48.80 / 52.40 70200144457
TB144609 1-3/4 X 24 - 28000 58.00 60.00 43.90 64.00 70200144609
TB150609 2 X 24 - 37000 90.00 102.00 60.30 115.00 70200150609
TB164609 2-1/2 X 24 - 60000 180.00 183.00 110.00 200.00 70200164609
TB170609 2-3/4 X 24 - 75000 210.00 214.00 / 248.00 70200170609
What is a Turnbuckle ?

A turnbuckle is a piece of hardware used to eliminate slack and adjust tension in a rope, cable, or other tensioning system.

ASME B30.26 – Rigging Hardware defines a turnbuckle as “an adjustable device consisting of three primary components: a body, a right-hand threaded end fitting, and a left-hand threaded end fitting.”

 

The end fitting on either side of a turnbuckle connects to the tensioning system and/or a securement point. The turnbuckle is then tightened or loosened to adjust tension and eliminate slack in the cable or rope is it connected to.

A turnbuckle may be used on its own or in conjunction with other turnbuckles to increase length in the assembly.

End Fittings: these are the two connection points that screw into the opposite ends of the turnbuckle body. One end fitting is right-hand threaded while the other is left-hand threaded. This allows you to turn the body to adjust tension after installation without moving the end fittings.

 

There are three main types of end fittings that can be used together in any combination on either end of the turnbuckle:

Hook end – a hook end fitting is used to create temporary connections because they are easy to quickly connect and disconnect. They should never be used in connections where tension could unexpectedly release.

Jaw end – a jaw end fitting consists of a jaw and bolt secured together by a nut or a pin. These are used to connect to components that cannot be opened, such as an eye bolt.

Eye end – an eye end fitting is a closed loop that can be connected to a shackle or quick link.

 

Thread diameter: this is the diameter measurement of the threaded portion of the end fittings. The greater the thread diameter is, the greater the load-bearing capacity of the turnbuckle and vice versa.

Take-up length: this is the total length that the end fittings can screw into and out of the body to “take up” tension. Take-up length can be measured in terms of “opened” or “closed” end fittings: the end fittings are either fully extended or fully retracted.


Types of Turnbuckles
Turnbuckle types are, essentially, named for the combination of end fittings used in the device. The most common end fitting combinations are:

Jaw and jaw

Eye and jaw

Eye and eye

Hook and hook

Hook and eye

Turnbuckle Inspection and Removal From Service Criteria

During the course of an inspection, remove the turnbuckle from service if any of the conditions listed in ASME B30.26 – Rigging Hardware are present:

Missing or illegible identification

Indications of heat damage, including weld spatter or arc strikes

Excessive pitting or corrosion

Bent, twisted, distorted, stretched, elongated, cracked, or broken load-bearing components

Excessive nicks or gouges

A 10% reduction of the original or catalog dimension at any point

Excessive thread damage or wear

Evidence of unauthorized welding or modification

Other conditions, including visible damage, that cause doubt as to continued use

 

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